import pymysql

class Db:
    def __init__(self):
        self.conn = pymysql.connect(host='localhost',port=3306,user='root',password='1201',charset='utf8',db='workf',cursorclass=pymysql.cursors.DictCursor)
        self.cursor = self.conn.cursor()

    def update(self,sql):
        self.cursor.execute(sql)
        self.conn.commit()

    def findone(self,sql):
        self.cursor.execute(sql)
        res = self.cursor.fetchone()
        return res

    def findall(self, sql):
        self.cursor.execute(sql)
        res = self.cursor.fetchall()
        return res

dbs = Db()